TPO and Hashimoto thyroiditis: Thyrotropin receptor antibodies (TRAb) and/or thyroid stimulating antibody (TSAb) are usually used for diagnosis of Basedow’s disease [1, 2], and thyroid peroxidase antibodies (TPOAb) and/or thyroglobulin antibodies (TgAb) are for diagnosis of Hashimoto’s thyroiditis [3, 4].